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From Markus Jelsma <markus.jel...@openindex.io>
Subject RE: Java version 11 for solr 7.5?
Date Wed, 26 Sep 2018 15:43:59 GMT
Indeed, but JDK-8038348 has been fixed very recently for Java 9 or higher.
 
-----Original message-----
> From:Jeff Courtade <courtadejeff@gmail.com>
> Sent: Wednesday 26th September 2018 17:36
> To: solr-user@lucene.apache.org
> Subject: Re: Java version 11 for solr 7.5?
> 
> My concern with using g1 is solely based on finding this.
> Does anyone have any information on this?
> 
> https://wiki.apache.org/lucene-java/JavaBugs#Oracle_Java_.2F_Sun_Java_.2F_OpenJDK_Bugs
> 
> "Do not, under any circumstances, run Lucene with the G1 garbage collector.
> Lucene's test suite fails with the G1 garbage collector on a regular basis,
> including bugs that cause index corruption. There is no person on this
> planet that seems to understand such bugs (see
> https://bugs.openjdk.java.net/browse/JDK-8038348, open for over a year), so
> don't count on the situation changing soon. This information is not out of
> date, and don't think that the next oracle java release will fix the
> situation."
> 
> 
> On Wed, Sep 26, 2018 at 11:08 AM Walter Underwood <wunder@wunderwood.org>
> wrote:
> 
> > We’ve been running G1 in prod for at least 18 months. Our biggest cluster
> > is 48 machines, each with 36 CPUs, running 6.6.2. We also run it on our
> > 4.10.4 master/slave cluster.
> >
> > wunder
> > Walter Underwood
> > wunder@wunderwood.org
> > http://observer.wunderwood.org/  (my blog)
> >
> > > On Sep 26, 2018, at 7:37 AM, Jeff Courtade <courtadejeff@gmail.com>
> > wrote:
> > >
> > > Thanks for that...
> > > I am just starting to look at this I was unaware of the license debacle.
> > >
> > > Automated testing up to 10 is great.
> > >
> > > I am still curious about the GC1 being supported now...
> > >
> > > On Wed, Sep 26, 2018 at 10:25 AM Zisis T. <zistach@runbox.com> wrote:
> > >
> > >> Jeff Courtade wrote
> > >>> Can we use GC1 garbage collection yet or do we still need to use CMS?
> > >>
> > >> I believe you should be safe to go with G1. We've applied it in in a
> > Solr
> > >> 6.6 cluster with 10 shards, 3 replicas per shard and an index of about
> > >> 500GB
> > >> (1,5T counting all replicas) and it works extremely well (throughput >
> > >> 99%).
> > >> The use-case includes complex search queries and faceting.
> > >> There is also this post you can use as a starting point
> > >>
> > >>
> > http://blog.cloudera.com/blog/2017/06/apache-solr-memory-tuning-for-production/
> > >>
> > >>
> > >>
> > >>
> > >> --
> > >> Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
> > >>
> > > --
> > >
> > > Jeff Courtade
> > > M: 240.507.6116 <(240)%20507-6116>
> >
> > --
> 
> Jeff Courtade
> M: 240.507.6116
> 

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